Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||||
| Segment information | ||||||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||||||
| Sales | ||||||||||||||||
| Revenues from external customers | 
                                                2,162,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,457,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,859,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,801,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,802,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,891,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,153,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,299,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,153,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                243,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                713,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |